beginning of map layer control

website/src/lib/components/ui/radio-group/index.ts

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+import { RadioGroup as RadioGroupPrimitive } from "bits-ui";
+
+import Root from "./radio-group.svelte";
+import Item from "./radio-group-item.svelte";
+const Input = RadioGroupPrimitive.Input;
+
+export {
+	Root,
+	Input,
+	Item,
+	//
+	Root as RadioGroup,
+	Input as RadioGroupInput,
+	Item as RadioGroupItem,
+};

website/src/lib/components/ui/radio-group/radio-group-item.svelte

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+<script lang="ts">
+	import { RadioGroup as RadioGroupPrimitive } from "bits-ui";
+	import Circle from "lucide-svelte/icons/circle";
+	import { cn } from "$lib/utils.js";
+
+	type $$Props = RadioGroupPrimitive.ItemProps;
+	type $$Events = RadioGroupPrimitive.ItemEvents;
+
+	let className: $$Props["class"] = undefined;
+	export let value: $$Props["value"];
+	export { className as class };
+</script>
+
+<RadioGroupPrimitive.Item
+	{value}
+	class={cn(
+		"aspect-square h-4 w-4 rounded-full border border-primary text-primary ring-offset-background focus:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+		className
+	)}
+	{...$$restProps}
+	on:click
+>
+	<div class="flex items-center justify-center">
+		<RadioGroupPrimitive.ItemIndicator>
+			<Circle class="h-2.5 w-2.5 fill-current text-current" />
+		</RadioGroupPrimitive.ItemIndicator>
+	</div>
+</RadioGroupPrimitive.Item>

website/src/lib/components/ui/radio-group/radio-group.svelte

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+<script lang="ts">
+	import { RadioGroup as RadioGroupPrimitive } from "bits-ui";
+	import { cn } from "$lib/utils.js";
+
+	type $$Props = RadioGroupPrimitive.Props;
+
+	let className: $$Props["class"] = undefined;
+	export let value: $$Props["value"] = undefined;
+	export { className as class };
+</script>
+
+<RadioGroupPrimitive.Root bind:value class={cn("grid gap-2", className)} {...$$restProps}>
+	<slot />
+</RadioGroupPrimitive.Root>